Alfred b



(Model.)

A. B. TA'NNER.

DOOR SPRING.

Patented Jan. 17, 18 82.

PETERS. Pbom-Lmwgnpher, washlngmn, D. C4

UNITED STATES PATENT OEETCE.v

ALFRED E. TANNEE, or NEW HAVEN, coNNEeTreUT, AssieNou To sAEeENT a co., or sAME-PLAOE.

DOOR-SPRING.

SPECIFICATION forming part of Letters Patent No. 252,541, datedl January 17, 1882.

Application filed October 31, 1881.

To all whom tt may concern:

Be it known that I, ALFRED B. TANNEE, of New Haven, in the county of New Haven and State of Connecticut, have invented a new Improvement in Door-Springs; and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description ot' the same,

ro and which said drawings constitute part ot' this specification, and represent, in

Figure 1, a front view of the spring as applied to the door; Fig. 2, a front view of the adjustable connection enlarged; Fig. 3, a transverse section on line a' w ot' Fig. Fig. 4, a

transverse section on line y y ot' the same tigure; Fig. 5, a side view. l

This invention relates to an improvement in that class of springs for doors which consist of 2o a spiral wire spring attached by one end to the jamb and by the other end to the door, so that as the door is opened the springis coiled, and the reaction otl the spring serves to close the door when tree, the object ot' the invention being a device by which the tension or force of the spring may be readily adjusted-that is, to make it greater or less-and also to enable the force ot' the spring to be applied after the ends have been attached to the door and jainb;

3o and the invention consists in the construction,

as hereinafter described, and particularly recited in the claim.

A represents the stile of the door, and B the jamb. U is the spring, which is made 5 from wire coiled in a helical or spiral form, one end made fast to an attaching-piece, D,which, as here represented, is secured to the jamb in the usual manner, the spring standing in an inclined position, so that while one end 4o lies upon the jamb the other extends tothe door. The upper end ot' thc spring is made fast to a spindle, D. This spindle extends up through a bracket, E, titted to be secured to the door. the spindle are arranged one above the other, so as to leave a space between them, as seen in Figs.2 and 5. The upper end, d, ofthe spindle is made square or polygonal, so that a wrench may be readily applied to twist the 5o spring'.

The bearings a b in the bracket for That part of the spindle between the l (Model.)

two bearings b a is made, one portion, e, polygonal, and the other portion,f, cylindrical, prefernbly'the cylindrical part above the polygonal. Those parts are shown respectively in section, Figs. 3 and 4. In the space be- 55 tween the bearings a b a plate, h, is arranged, having an opening through it corresponding to.the polygonal shape ot' the spindle, as seen in Fig. 3, and so as to bear upon the bracket at the back, or elsewhere, whereby the said 6o plate is prevented from turning. Thecylin` drical partf is no greater in diameter than the smallest diameter of the polygonalv part; hence, it' the plate h be upon the polygonal part, as in Fig. 3, the spindle cannot turn, 65 because the plate h will prevent it; but if the plate h be moved upon the cylindrical part, as

in broken lines, Fig. 2, and as shown in Fig. 4, then the spindle is free to be turned.

To apply the spring the plate 71l isy moved up 7o upon the cylindrical part j' and the bracket E secured to the door, the spring during such operation being free, so that no difculty is experienced in attaching the bracket; but when attached the plate F is still on the cylin- 75 drical part. The wrench or similar instrument is applied to the upper end, d, of the spindle, and the spring is twisted until the required tension is attained; then the plate h is moved down upon the polygonal part c, so as to en- 8o gage that part with the bracket and prevent the return of the previously twisted spring. Then the wrench may be removed. It, at any time, it is desirable to increase or reduce the torce of the spring, apply the wrench, m-ove the plate h from the polygonal part e to the cylindrical part, then make the adjustment and return the plate to hold the spring when so adjusted; or it' it be desired for a time to entirely remove the power of the spring from the 9o door, simply raise the plate h upon the cylindrical partfot' the spindle and the door is entirely free from the power ot' the spring.

I am aware that door-springs have been constructed with a polygonal portion, on which `a locking-plate was arranged so as to be moved* on said polygonal portieri to engage or disengage the socket, and so that when engaged with, t-he socket the spring would be held, or when disengaged the spring might be turned roo for adjustment. I do not, therefore, wish to be l ing-plate h, arranged to take its bearing upon 1o understood as making any claim to such Well the bracket and over the said polygonal or known construction. cylindrical parts of the spindle, substantially I claimas and for the purpose described. 5 The combination of the spiral spring, made l fasts at one end, with the spindle D, fixed et ALFRED B TANNER its opposite end and supported by a bracket., W tnesses: the said spindle constructed with the polygo- F. NV. BROGKSIEPER, nal and cylindrical portions ef, and the lock- JOHN E. EARLE. 

